San Diego RIPA Data Pillars Project

Descriptive Analysis

Before engaging in detailed analysis regarding the project’s research questions, we ran general frequencies of SDPD stops to get a sense of overall trends. This helps us determine if our expected findings are likely to show up in the data and allows us to identify any trends we did not expect. The analysis includes:

General counts and percents of SDPD stops by key fields in RIPA data, e.g., stop reason, stop result, calls for service, race, age, searches, officer assignment.

General counts and percents of stops by Gang Suppression Unit and Special Operations Unit (if available) by key fields in RIPA data, e.g., stop reason, stop result, calls for service, race, age, searches.

Calls for Service versus Officer-initiated

Analysis cut by all unit types:

Stop Counts and Rates by Response to Service Call for All Units

Year	Assignment	Call for Service	Total	Count	Percent	Average Stop Time (Mins)	Median Stop Time (Mins)	Min Stop Time (Mins)	Max Stop Time (Mins)	Total Time (Mins)
2022	All units	No	86,632	79,416	91.7	27.4	10.0	1	1,440	2,173,760
2022	All units	Yes	86,632	7,216	8.3	59.3	30.0	1	1,220	428,183

Analysis filtered for gang suppression unit:

Stop Counts and Rates by Response to Service Call for Gang Suppression Unit

Year	Assignment	Call for Service	Total	Count	Percent	Average Stop Time (Mins)	Median Stop Time (Mins)	Min Stop Time (Mins)	Max Stop Time (Mins)	Total Time (Mins)
2022	Gang enforcement	No	420	397	94.5	29.3	15	1	300	11,613
2022	Gang enforcement	Yes	420	23	5.5	123.9	120	20	260	2,850

Total Officer-Intiated Stops Over Time

Total Count of Officer-Initiated Stops Over Time

Year	All Units Total	Gang Suppression Unit Total
2018	69,766	1,501
2019	142,663	3,263
2020	116,754	1,592
2021	104,561	643
2022	79,416	397
2023	21,578	95

Total Officer-Intiated Stops in 2022

Total and Rate of Stops by Patrol Assignment Type in 2022

Year	Patrol Assignment	Total	Count	Percent
2022	Patrol, traffic enforcement, field operations	79,416	77,386	97.4
2022	Other	79,416	1,121	1.4
2022	Gang enforcement	79,416	397	0.5
2022	Investigative/detective	79,416	304	0.4
2022	Narcotics/vice	79,416	108	0.1
2022	Special events	79,416	45	0.1
2022	K1-12 public school inlcuding school resource officer or school police officer	79,416	43	0.1
2022	Task force	79,416	10	0.0
2022	Compliance check	79,416	2	0.0

Stop Reason and Rersults

Stops by stop reason

Total and Rate of Officer-Initiated Stops by Stop Reason

Year	Assignment	Reason for stop	Total	Count	Percent
2022	All units	Traffic Violation	90,777	48,926	53.9
2022	All units	Reasonable Suspicion	90,777	39,019	43.0
2022	All units	Knowledge of outstanding arrest warrant/wanted person	90,777	1,281	1.4
2022	All units	Investigation to determine whether the person was truant	90,777	734	0.8
2022	All units	Known to be on Parole / Probation / PRCS / Mandatory Supervision	90,777	553	0.6
2022	All units	Consensual Encounter resulting in a search	90,777	262	0.3
2022	All units	Determine whether the student violated school policy	90,777	2	0.0
2022	Gang enforcement	Traffic Violation	489	341	69.7
2022	Gang enforcement	Reasonable Suspicion	489	119	24.3
2022	Gang enforcement	Knowledge of outstanding arrest warrant/wanted person	489	16	3.3
2022	Gang enforcement	Known to be on Parole / Probation / PRCS / Mandatory Supervision	489	6	1.2
2022	Gang enforcement	Investigation to determine whether the person was truant	489	4	0.8
2022	Gang enforcement	Consensual Encounter resulting in a search	489	3	0.6

Stops by stop result

Total and Rate of Officer-Initiated Stops by Stop Result

Year	Assignment	Result of Stop	Total	Count	Percent
2022	All units	Citation for infraction	95,543	26,229	27.5
2022	All units	Warning (verbal or written)	95,543	24,643	25.8
2022	All units	Field interview card completed	95,543	12,377	13.0
2022	All units	Custodial Arrest without warrant	95,543	10,317	10.8
2022	All units	No Action	95,543	9,129	9.6
2022	All units	Custodial Arrest pursuant to outstanding warrant	95,543	4,172	4.4
2022	All units	Psychiatric hold	95,543	3,793	4.0
2022	All units	In-field cite and release	95,543	3,136	3.3
2022	All units	Noncriminal transport or caretaking transport	95,543	1,410	1.5
2022	All units	Contacted parent/legal guardian or other person responsible for the minor	95,543	330	0.3
2022	All units	Contacted U.S. Department of Homeland Security	95,543	3	0.0
2022	All units	Referral to school administrator	95,543	3	0.0
2022	All units	Referral to school counselor or other support staff	95,543	1	0.0
2022	Gang enforcement	Field interview card completed	500	201	40.2
2022	Gang enforcement	Warning (verbal or written)	500	103	20.6
2022	Gang enforcement	Custodial Arrest without warrant	500	62	12.4
2022	Gang enforcement	No Action	500	51	10.2
2022	Gang enforcement	Citation for infraction	500	36	7.2
2022	Gang enforcement	Custodial Arrest pursuant to outstanding warrant	500	21	4.2
2022	Gang enforcement	Psychiatric hold	500	17	3.4
2022	Gang enforcement	In-field cite and release	500	7	1.4
2022	Gang enforcement	Contacted parent/legal guardian or other person responsible for the minor	500	2	0.4

Hit Rates

Demographics of Stops

Stops by age

Note that the numbers might be slightly inflated because there are some people that are indicated as having more than 1 perceived age. But for the purposes of this descriptive analysis we want to see general trends and are OK with some duplicates for the time being.

Total and Rate of Officer-Initiated Stops by Age Group

Year	Assignment	Age	Total	Count	Percent
2022	All units	18 and under	88,099	3,293	3.7
2022	All units	19-24	88,099	10,738	12.2
2022	All units	25-34	88,099	28,760	32.6
2022	All units	35-44	88,099	20,691	23.5
2022	All units	45-54	88,099	13,769	15.6
2022	All units	55-64	88,099	7,846	8.9
2022	All units	65 and older	88,099	3,002	3.4
2022	Gang enforcement	18 and under	484	48	9.9
2022	Gang enforcement	19-24	484	88	18.2
2022	Gang enforcement	25-34	484	174	36.0
2022	Gang enforcement	35-44	484	95	19.6
2022	Gang enforcement	45-54	484	41	8.5
2022	Gang enforcement	55-64	484	25	5.2
2022	Gang enforcement	65 and older	484	13	2.7

Stops by race

Total and Rate of Officer-Initiated Stops by Race

Year	Assignment	Race	Total	Count	Percent
2022	All units	nh_white	88,099	32,133	36.5
2022	All units	latinx	88,099	30,234	34.3
2022	All units	nh_black	88,099	16,874	19.2
2022	All units	nh_asian	88,099	4,603	5.2
2022	All units	mesa	88,099	3,051	3.5
2022	All units	nhpi	88,099	870	1.0
2022	All units	nh_twoormor	88,099	513	0.6
2022	All units	aian	88,099	227	0.3
2022	Gang enforcement	latinx	484	194	40.1
2022	Gang enforcement	nh_black	484	157	32.4
2022	Gang enforcement	nh_white	484	89	18.4
2022	Gang enforcement	nh_asian	484	33	6.8
2022	Gang enforcement	mesa	484	7	1.4
2022	Gang enforcement	aian	484	3	0.6
2022	Gang enforcement	nh_twoormor	484	1	0.2
2022	Gang enforcement	nhpi	484	0	0.0

Map

Map of stop counts by police beat and for Gang Suppression Unit/Special Operations Unit.